Provided is a method of controlling an uplink noise level in a multi-radio unit (RU) environment in which each RU measures an ordinary noise level using a power monitoring function thereof when there is no user traffic and then controls an uplink noise level based on the ordinary noise level.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method of controlling an uplink noise level performed by each of radio units (RUs) connected to one digital unit (DU) in a multi-RU environment, the method comprising: (a) measuring powers of all signals input for at least 24 hours N times an hour at time intervals of T; (b) selecting M pieces of data in order of increasing value from among hourly power data measured in operation (a); (c) estimating a noise power of every hour within 24 hours using a method of estimating a noise power of the corresponding hour by averaging the M pieces of data selected in operation (b); (d) selecting a minimum from among the noise powers estimated in operation (c) and determining the selected minimum as a noise power; and (e) adjusting a gain of an amplifier based on the determined noise power.
2. The method of claim 1 , wherein operation (c) comprises estimating a noise power of every hour within the 24 hours using a method of estimating a noise power of the corresponding hour by averaging the M pieces of data excluding data exceeding a reference value.
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May 14, 2015
January 3, 2017
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